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n in (-oo:+oo)
(-1/2)*n+8 = 83/11 // - 83/11
(-1/2)*n-(83/11)+8 = 0
(-1/2)*n-83/11+8 = 0
5/11-1/2*n = 0 // - 5/11
-1/2*n = -5/11 // : -1/2
n = -5/11/(-1/2)
n = 10/11
n = 10/11
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